Rally in Nairobi's Uhuru Park

Raila Odinga, Kalonzo Musyoka and Moses Wetangula wave during a rally at Uhuru Park in Nairobi, July 7, 2014.

A supporter of Kenya's opposition Coalition for Reforms and Democracy bleeds from a head injury while engaging with riot police before the "Saba Saba Day" rally at the Uhuru park grounds in Nairobi, July 7, 2014.

Orange Democratic Movement leader Raila Odinga addresses the crowd during a rally at Uhuru Park in Nairobi, July 7, 2014.

Supporters of Kenya's opposition Coalition for Reforms and Democracy arrive singing slogans at the venue for their "Saba Saba Day" rally demanding dialogue with the government, at the Uhuru park grounds in Nairobi, July 7, 2014.

Supporters of Kenya's opposition Coalition for Reforms and Democracy run along the streets before their "Saba Saba Day" rally demanding dialogue with the government, at the Uhuru park grounds in Nairobi, July 7, 2014.

Riot police walk down the street after firing tear gas to disperse supporters of Kenya's opposition Coalition for Reforms and Democracy before their "Saba Saba Day" rally at the Uhuru park grounds in Nairobi, July 7, 2014.